Maintainer-completed @thanhtantran's #4241 (Nathan approved bringing it in):
- vi locale block in static/i18n.js (contributor's 1615-line translation) rebased onto master.
- Added vi to _LOGIN_LOCALE in api/routes.py (login-page localization, issue #1442 parity).
- Bumped the per-locale hardcoded-count assertions 13->14 across the locale-parity
tests (rtl, quota_chip, hide_suggestions, virtualize_transcript, no_git, help_tab,
verdigris/zeus skins, auxiliary_models) and added 'vi' to the composer-voice-buttons
LOCALES tuples. vi already carries all current English keys (verified 14x per key).
All 497 locale/parity tests pass. Co-authored-by: thanhtantran
Virtualization (#500/#4214) caused a scroll-up flicker on long sessions with
tall tool-call rows (variable-height anchor oscillation), distinct from the
stream-completion jump fixed in #4325. Per maintainer decision, flip the
'Virtualize long transcripts' preference to experimental/opt-IN (default OFF)
for everyone until the scroll behavior is reliable.
- api/config.py: virtualize_transcript default True->False; add
virtualize_transcript_optin marker (both bool-allowlisted); load_settings
force-off migration — a stored true WITHOUT the post-flip opt-in marker is
reset to off, so 100% of existing users land on off; an explicit opt-in
(marker present) is honored.
- boot.js / panels.js: default-off semantics (===true), persist the opt-in
marker on enable, checkbox not pre-checked.
- index.html / i18n.js (en): relabel experimental + flicker warning.
- Tests: rewrite the #4325 toggle assertions for the opt-in contract + 4 new
migration tests (unset/stale-true/explicit-optin/marker-without-true).
Phase B (root-cause scroll-stability) tracked separately. Thanks @b3nw.
Adds a Preferences setting 'Virtualize long transcripts' (default ON, opt-out).
When disabled, _currentMessageVirtualWindow returns a full non-virtualized window
so the entire transcript renders at once (also short-circuits the virtual
re-measure loop). Server-persisted (virtualize_transcript bool, default True),
hot-applies via renderMessages on toggle. i18n in all 13 locales.
Pairs with @rodboev's #4328 stream-end anchor scroll fix (cherry-picked into
this branch) to fully resolve#4325.
nesquena-hermes